Four more people in China have been infected with a new strain of bird flu, a local government said Tuesday, bringing the country's total to seven.
A woman works at a chicken farm in Zouping, east China's Shandong province on April 1, 2013. The World Health Organisation has played down fears over a strain of bird flu which has killed two people in China, but said it was crucial to find out how the virus infected humans.
Three women and one man had contracted H7N9 avian influenza, the health bureau in the eastern province of Jiangsu said in a statement.
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